@azure/opentelemetry-instrumentation-azure-sdk [ 'Module @azure/core-tracing has been loaded before @azure/opentelemetry-instrumentation-azure-sdk so it might not work, please initialize it before requiring @azure/core-tracing' ]

@opentelemetry/instrumentation-winston [ 'Module winston has been loaded before @opentelemetry/instrumentation-winston so it might not work, please initialize it before requiring winston' ]

@opentelemetry/instrumentation-winston [ 'Module winston has been loaded before @opentelemetry/instrumentation-winston so it might not work, please initialize it before requiring winston' ]

I'm using "applicationinsights": "^3.5.0" and getting the above warnings.

app-insights.ts

import appInsights from "applicationinsights";

//Your Azure Application Insights connection string
const CONNECTION_STRING ="ABC";

//Initialize Application Insights SDK
appInsights
  .setup(CONNECTION_STRING)
  .setAutoCollectRequests(true)
  .setAutoCollectDependencies(true)
  .setAutoCollectConsole(true) //Sending All console logs to the azure application insights
  .setAutoCollectPerformance(true, true)
  .setDistributedTracingMode(appInsights.DistributedTracingModes.AI_AND_W3C) //Enabling distributed tracing
  .start(); //Start the SDK to work

Importing it in the start of the application. e.g

index.ts

import "./src/app-insights.ts"; // Here it is
import express from "express";
import cors from "cors";

@azure/opentelemetry-instrumentation-azure-sdk [ 'Module @azure/core-tracing has been loaded before @azure/opentelemetry-instrumentation-azure-sdk so it might not work, please initialize it before requiring @azure/core-tracing' ]

@opentelemetry/instrumentation-winston [ 'Module winston has been loaded before @opentelemetry/instrumentation-winston so it might not work, please initialize it before requiring winston' ]

@opentelemetry/instrumentation-winston [ 'Module winston has been loaded before @opentelemetry/instrumentation-winston so it might not work, please initialize it before requiring winston' ]

I'm using "applicationinsights": "^3.5.0" and getting the above warnings.

app-insights.ts

import appInsights from "applicationinsights";

//Your Azure Application Insights connection string
const CONNECTION_STRING ="ABC";

//Initialize Application Insights SDK
appInsights
  .setup(CONNECTION_STRING)
  .setAutoCollectRequests(true)
  .setAutoCollectDependencies(true)
  .setAutoCollectConsole(true) //Sending All console logs to the azure application insights
  .setAutoCollectPerformance(true, true)
  .setDistributedTracingMode(appInsights.DistributedTracingModes.AI_AND_W3C) //Enabling distributed tracing
  .start(); //Start the SDK to work

Importing it in the start of the application. e.g

index.ts

import "./src/app-insights.ts"; // Here it is
import express from "express";
import cors from "cors";

• node.js
• azure
• warnings
• azure-monitor

• Can you share your code in the question? – Dasari Kamali Commented 16 hours ago
• 1 @DasariKamali I have shared the code. – Muhammad Faraz Ali Commented 12 hours ago

1 Answer 1

The warnings say that some modules are loaded before their OpenTelemetry instrumentations, which may cause issues. I tried the sample code with OpenTelemetry packages and successfully obtained the output without any issues.

package.json :

"dependencies": {
    "@azure/opentelemetry-instrumentation-azure-sdk": "^1.0.0-beta.7",
    "@opentelemetry/instrumentation-express": "^0.47.0",
    "@opentelemetry/instrumentation-winston": "^0.44.0",
    "applicationinsights": "^3.5.0",
    "cors": "^2.8.5",
    "express": "^4.21.2",
    "nodemon": "^3.1.9",
    "ts-node": "^10.9.2",
    "typescript": "^5.7.3",
    "winston": "^3.17.0"
  }

app-insights.ts :

import { AzureMonitorTraceExporter } from "@azure/monitor-opentelemetry-exporter";
import { NodeTracerProvider } from "@opentelemetry/sdk-trace-node";
import { BatchSpanProcessor } from "@opentelemetry/sdk-trace-base";
import { diag, DiagConsoleLogger, DiagLogLevel } from "@opentelemetry/api";
import { registerInstrumentations } from "@opentelemetry/instrumentation";
import { HttpInstrumentation } from "@opentelemetry/instrumentation-http";
import { ExpressInstrumentation } from "@opentelemetry/instrumentation-express";
import { WinstonInstrumentation } from "@opentelemetry/instrumentation-winston";

diag.setLogger(new DiagConsoleLogger(), DiagLogLevel.INFO);

const provider = new NodeTracerProvider();
const exporter = new AzureMonitorTraceExporter({
  connectionString: "<AppInsightsConneString>",
});

provider.addSpanProcessor(new BatchSpanProcessor(exporter));
provider.register();
registerInstrumentations({
  instrumentations: [
    new HttpInstrumentation(), 
    new ExpressInstrumentation(),  
    new WinstonInstrumentation(), 
  ],
});

console.log("OpenTelemetry tracing successfully configured.");

service.ts :

import "./app-insights"; 
import winston from "winston"; 
import express from "express";
import cors from "cors";
import { trace, context } from "@opentelemetry/api";

const logger = winston.createLogger({
  level: "info",
  format: winston.format.json(),
  transports: [new winston.transports.Console()],
});

const app = express();
app.use(cors());
app.use(express.json());

app.use((req, res, next) => {
  const originalSend = res.send;
  res.send = function (body) {
    const span = trace.getSpan(context.active());
    if (span) {
      span.addEvent("response", { body });
    }
    return originalSend.call(this, body);
  };
  next();
});

app.get("", (req, res) => {
  res.send("Welcome to my world Kamali!");  
});

const PORT = 3000;
app.listen(PORT, () => {
  logger.info(`Server running on http://localhost:${PORT}`);
});

Output :

I got below output in the browser.

Transaction search :